Catholic voting is pretty much like it has always been, democrat.
Comparing them to non-Christians is probably the right thing for you to do, which you did, you sure wouldn’t want to compare the Catholic vote to the non-Catholic Christian vote, which always goes republican.
The majority of baptized members of the Catholic denomination, vote democrat, that is why the democrats wanted the 1965 Immigration Act so badly.
You are exactly correct when Hispanics are thrown into the mix. About 1/3 of all Catholics are Hispanics and Soetoro won 3/4 of all Hispanic votes in the last election.
My only point is that white Catholic voters ex-Hispanics, vote along the same lines as the overall general white population.